Congenital Hyperostosis

Hyperostosis (Image sourced from Bristol Biomed Image Archive with permission)

• In pigs
• Rare, genetic
• Diaphysial dysplasia
• Excessive periosteal intramembranous bone, particularly in long bones
• Grossly:
  • Greatly thickened long bones
  • Tense, shiny skin, closely adherent to tissues below
• Born dead or die soon after birth